You can capture the values <yourvendorid> and <yourproductid> by entering the command lsusb in Terminal -- when your USB device is plugged in -- which will list all your USB devices currently available, like Bus 003 Device 002: ID 8087:07da Intel Corp., where 8087 is the VendorID and 07da is the ProductID.

And <yourdevice> can be any arbitrary name you may choose for your USB device, for example, I chose to use the generic name "keyboard" when creating such files for my USB keyboard which required applying a different keyboard layout whenever it's plugged in.

In some scenarios, it may not be necessary to use the ACTION=="remove" line in the udev rules file, and hence the associated 2 (two) "out" files, when you don't need to do anything (e.g. reverse a change made when the device is plugged in) after the device is plugged out.